Dan Nagle questions

Dan Nagle answers

• Mongodb upsert command in nodejs
• How to res.send to a new URL in Node.js/Express?
• Inform user that message is still being typed
• global variables in JS vs local storage vs values in DOM, which one will be more efficient? [closed]
• how to uninstall pyenv(installed by homebrew) on Mac
• How do event loop and v8 engine interact with each other in NodeJS?